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Phase v7-2: SmallObject v7 C6-only implementation with RegionIdBox integration

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- SmallSegment_v7: 2MiB segment with TLS slot and free page stack
- ColdIface_v7: Page refill/retire between HotBox and SegmentBox
- HotBox_v7: Full C6-only alloc/free with header writing (HEADER_MAGIC|class_idx)
- Free path early-exit: Check v7 route BEFORE ss_fast_lookup (separate mmap segment)
- RegionIdBox: Register v7 segment for ptr->region lookup
- Benchmark: v7 ON ~54.5M ops/s (-7% overhead vs 58.6M legacy baseline)

v7 correctly balances alloc/free counts and page lifecycle.
RegionIdBox overhead identified as primary cost driver.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
This commit is contained in:
Moe Charm (CI)
2025-12-12 03:12:28 +09:00
parent a8d0ab06fc
commit 39a3c53dbc
17 changed files with 1729 additions and 61 deletions
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1
core/box/free_path_stats_box.h
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@ -17,6 +17,7 @@ typedef struct FreePathStats {
uint64_t c4_ultra_alloc_hit; // Phase 6: C4 ULTRA-alloc (TLS pop)
uint64_t smallheap_v3_fast;
uint64_t smallheap_v6_fast;
uint64_t smallheap_v7_fast; // Phase v7-2: SmallHeap v7 fast free
uint64_t tiny_heap_v1_fast;
uint64_t pool_v1_fast;
uint64_t remote_free;